84723731 has 2 divisors, whose sum is σ = 84723732. Its totient is φ = 84723730.

The previous prime is 84723707. The next prime is 84723757. The reversal of 84723731 is 13732748.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84723731 is a prime.

It is a super-3 number, since 3×84723731³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is equal to p_4928624 and since 84723731 and 4928624 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 84723691 and 84723700.

It is not a weakly prime, because it can be changed into another prime (84723701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42361865 + 42361866.

It is an arithmetic number, because the mean of its divisors is an integer number (42361866).

Almost surely, 2^84723731 is an apocalyptic number.

84723731 is a deficient number, since it is larger than the sum of its proper divisors (1).

84723731 is an equidigital number, since it uses as much as digits as its factorization.

84723731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 35.

The square root of 84723731 is about 9204.5494729509. The cubic root of 84723731 is about 439.2060942189.

The spelling of 84723731 in words is "eighty-four million, seven hundred twenty-three thousand, seven hundred thirty-one".